单项选择题
A.乘坐电梯 B.从楼梯逃生 C.提醒其他同学发生火情 D.到窗户呼救
A.80%,50% B.90%,80% C.100%,60% D.80%,80%
A.80%,1/3 B.70%,1/4 C.80%,1/5 D.80%,1/2